Rocket fuel

The space-ship Viking—two hundred feet of gleaming metal and polished duralite—lay on the launching platform of New York City's municipal airport. Her many portholes gleamed with light. She was still taking on rocket fuel from a tender, but otherwise all the final stores were aboard. Her helicopters were turning over slowly, one at a time, as they were tested. In the

The space-ship Viking—two hundred feet of gleaming metal and polished
duralite—lay on the launching platform of New York City's municipal
airport. Her many portholes gleamed with light. She was still taking
on rocket fuel from a tender, but otherwise all the final stores were
aboard. Her helicopters were turning over slowly, one at a time, as they
were tested.
In the Viking's upper control room Gerry Norton and Steve Brent
made a final check of the instrument panels. Both men wore the blue and
gold uniform of the Interplanetary Fleet.

This acknowledgment is necessary if I am to say thanks to some experts
to whom I am indebted. There is Captain Charles Benjamin, who read
over the aviation parts of this book with pursed lips and a belligerent attitude
toward questionable statements of fact or observation. There is Dr.
John Drury Clark, whose authoritative knowledge of rocket fuels was the
basis for admitted but not extravagant extrapolation on my part.

We discuss the two most promising scenarios presented in Hutton et al, namely an
improved stove intervention and use of LPG instead of solid fuel. The improved stove
intervention is a chimneyless rocket stove, assumed to reduce SFU health effects by 35
percent. Annualized unit stove cost is US $ 2.6-3.1. Annualized unit cost of LPG stove
and gas cylinder is US $9-18. LPG consumption is 0.3-0.9 kg per household per day.
Annualized program cost per household is less than one dollar in most regions.
14
Reduced mortality is valued at the human...

In modern usage, the term is used to describe devices capable of performing mechanical work, as in the original steam engine. In most cases the work is produced by exerting a torque or linear force, which is used to operate other machinery which can generate electricity, pump water, or compress gas. In the context of propulsion systems, an air-breathing engine is one that uses atmospheric air to oxidise the fuel carried rather than supplying an independent oxidizer, as in a rocket.